Alarm-whistle means for closure devices



F. C. STINZING. l ALARM WHlf'STl'E MEANS FOR CLOSRE DEVI APPLICATION man MAR. 11.1922.

Patented Sept. 5,

Patented Sept, 5, i922.,

trae

FRANK C. STTNZING, OF LONG- ISLAND CITY, NEW YORK,

ALARM-WHISTLE MEANS FOR CLOS'URE DEVICES.

` application filed March 11,1922. Seria] No. 542,923.

466,778, filed May' 4, 1921,1relates to automatic alarms whereby the attempted, Aunauthorized opening of a closure device, such as a door orwindow, may be audibly an Vnounced, asv by the production of a shrill,

continuous whistle.

Briefly expressed, the alarm consists of a whistle structure, operable by a charge of compressed air, underthe control of a `setting valve, that is provided with suitable locking means, to render its operation unavailable by other thanauthorized persons. The whistle is further controlled by an automatic valve, which is arranged to open by the action of a closure member in opening, thereby causing the whistle to sound, and to continue sounding` until the setting valve. is closed, or until'the supply of compressed air is exhausted. y

vOther features and advantages of myinvention will hereinafter appear.

l In the drawing:-

Figure 1 is ahorizontal sectional yview of my alarm apparatus, shownas applied to a sliding,r closure member` such for example as a sliding door.

Fig. 2 is a vertical, front view of a swinging closure member, such as a door, with my alarmvapparatus applied thereto, and Fig. 3 is a vertical, sectional view, on an enlarged scale, of a portion of the alarm apparatus.

In the example of Fig. 1 let 41 indicate a slidable door, which may be a cardoor 7 house door, or closure member for any purpose, and let 2 indicate a guide, runway, wall or casing along which the closurelmember may slide in order to uncover orexpose the opening` which the closure'member is intended to guard when closed.

The guide 2 is here shown as hollow, to

rereive the closure member,

Vmember 11.

its linner portion being provided with a revoluble lock member 3, that is capable of actuation by avkey 4, or other suitable mea-ns; the outer portion of the casing having` a key-way 5 to permit the introduction of the hey.

This lock member 3 has a squared shank 5 that engages a squared recess 7 in a conoidal valve 8, which is provided with a port 9 and controls aligned orifices 10 in the valve seating member 11, that comprise communicating means. between a compressed air cylinder 12 and a duct 13, (which latter may be of glass or other frangible material).

Thel duct'13 is vin communication with a valve chamber 14, which has a `valve 1.5 that lis capable of automatic operation.v

Vhen the valve 8 is open, it will be appreciated that Aif valve 15 also be opened, a

flow of air under pressure will escape from cylinder 12. This pressure iiow is utilized by me to actuate anwhis'tl'e that is located in the cylinder in advance of the valve seating As an example of whistle structure vwhich may be employed I have shown a hollow `cylinder 16, containing a diaphragmor reed 17, and having aneck portion 18 that is coveredbya disk 19, said disk being `of smallar diameter than said cylinder, and lying within the throat portion 20 of a conoidalmember 21, that rfits within the cylinder ,12 in the manner of' Va partition.A l A. .slightclearance 22 is left vvbetween the peripheral'edge yof disk 19 and the. wallfof portion 20, ,causing air to flow :in anl annular streamV throughsaid clearance, vfor imp ingeme'ntl against the .peripheral edgeof cylindergl, landresulting in the 4production of a-shrillf whistling sound.

To prevent tamperingwith the cylinder 12 it is made ofjgreat lstrength and is capable of containing air compressed to a large number of atmospheres. Therefore the relief means', in whose path the whistle is located, may be regulated by pressure reduction means, such as that indicated at 23, whereby the .compressed air 4supply may be inder charge prolonged.

The duct 13, here shown as, an elbow tube, fits into ay socketportion 24 forming part of valve seating-member 11, and a tight union therefor is eiected by means of a stuffing box in the form of a cap 25. A.

Also,y the -opposite end of the tube 13 conserved, and Ithe serviceability of a cylmains open.

is entered into tight union with valve chamber 14 by means of a stuffing box 26, of similar character.

The valve 15, which is of conoavo-convex form, has a stem 27 whereby it is to be operated in a manner to be hereinafter described. Said valve, at its concave side, co-acts with an annular seat 28, being intended to oscillate thereon, to open and close the passage 29 that extends through the seat. Springs 30 extend between the valve and the surface of seat 28, to normally centre the valve in its closed position, T he convex surface of valve 15 works against the concaved surface of a cylindrical mem ber 31, which is slidably fitted in a central opening in t-he rear wall 32 of valve casing 14, said wall having air ports 33; a spring 34 lying between wall 32 and a shoulder 35 on block 31, to urge the latter against valve 15, thus affording the requisite pressure to hold the valve normally against its seat.

rlhe block 31 is recessed at 36, to receive a disk 37, which has a stem 38 that extends through an axial orifice provided therefor in the block; a concentric enlargement 39 of the orifice in the block serving` to contain a spring 40 that normally urges the disk 37 away from its seat against the block and thereby holds the end of stem 38 out of Contact with valve 15.

But when pressure is applied to disk 37, which occurs when valve 8 is opened to ad mit air from compressor 12 to duct 13, then the disk 37 is thereby forced against its seat in block 31 and its stem is caused to pro` trude beyond the concaved face of the block, to engage valve 15.

T he valve- 15 is provided on its convex surface with a central concavity 41 for the reception of stem 38 when that is extended by air pressure against disk 37, overcoming the opposite pressure of spring 39. This concavity 41 is succeeded, at o posite sides, by depressions 42, so that tie valve, in oscillating, rides against stem 38, which is pressed back until it can return into a succeeding depression 42. Since the dividing wall'between concavity 41 and a succeeding depression 42 has a steep angle at its side adjacent the depression 42, it thereby constitutes a stop which engages the stem 38, to prevent the return of the valve to its closed position while the valve 8 re- The stem 27 of valve 15 is arranged to extend into the path of a sliding closure member, such as that indicated at 1, here shown as having a slot 43, whose right hand end surface is adapted, in the example represented, to engage the stem 27, and in the sliding movement of the closure member to the left, in opening, to thereby shift valve 15 to the open osition. When valve 15 is opened, with v ve 8 also open,

the effect is to permit the whistle to sound and to continue sounding until either the supply of compressed air is exhausted or valve 8 has'been closed.

The valve 15 cannot be closed while pressure is upon disk 37 for the reason already given that stem 38 is caught by the wall between concavity 41 and the depression 42 into which said stem has passed, and therefore the act of again closing the closure member will not affect the continued sounding ofthe whistle.

lt will be apparent, therefore, that while the valve 8 remains closed the closure member may be opened or closed without causing the whistle to operate7 but when the valve 8 has been opened, then the alarm is set in readiness for actuation by the opening` of the closure member.

The valve 15 must be re-set by hand after the alarm has been operated. n v

In the example of my invention shown in Fig. 2, where it is rendered applicable to a hinged or swinging closure member 4, 4, the alarm mechanism is of the same general character, and the valve stem 27 is indicated as lying against the inner 'surface of the closure member, at its rear edge, to be actuated by said closure member in swinging open. v

Variations within the spirit and scope of my invention are equally comprehended by the foregoing disclosure.

I claim 1. An alarm for indicating the unauthorized opening of a closure member, comprising a compressed air supply, a control therefor, a whistle, pressure release means lo cated in the path of movement of the closure member, in opening, to be operated thereby, and means for preventing the closing of the pressure release means while the control is open.

2. rllhe combination with a closure member, of a whistle, air pressure means for sounding the whistle, actuating means for the sounding means operable by the closure means in opening, and means to prevent the sounding means from being rendered inJ active while the supply of air pressure re vmains unexhausted.

3. The combination, with a closure mem ber, of a whistle, fluid pressure means for sounding the whistle, an oscillable valve having a stem extended in the path of the closure member, in opening, to actuate the valve for pressure release, and spring-re turn means subject to the influence ofthe sounding pressure to lock the valve in its pressure releasing position.

Signed at the borough of Manhattan, in the city, county and State of New York, this 7th day of March, 1922.

FRANK C. STlNZlNG. 

